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AM CLASSIFIEDS => For Sale / Trade => Topic started by: W2XR on March 14, 2019, 08:05:21 PM



Title: National Radio MB-40-SL Multi-Band Input/Output Tank Assembly: SOLD!
Post by: W2XR on March 14, 2019, 08:05:21 PM
I am doing my annual shack cleaning and I have a used National MB-40-SL Multiband Tank Assembly. I believe it can be used in push-pull and single-ended output tank circuit designs, with an output of 40 watts or less. It can also be used in the grid input stage when the drive/input power is 40 watts or less. It has a swinging link coupling coil. I think it is best suited for use as the tuned input tank circuit for a high-power common-cathode linear or class C amplifier.

I removed this a number of years ago from a homebrew linear amplifier that ran a pair of 811As in common cathode in the output stage. It was used in the input/grid circuit.

Unfortunately, I have no other technical information available pertaining to this unit.

The price is $35.00, plus the cost of shipping to your QTH.

Please contact me at triodes@optonline.net

Thanks & 73,

Bruce, W2XR
AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands